<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN"
"http://www.w3.org/TR/html4/strict.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
	<head>
		<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
		<title></title>
		<script type="text/javascript">
//								形参 相当于声明了一个变量
			function calculation(a,b){
				var res = a*b;
				document.write(res);
			}
//						实参 相当于给变量赋值
			calculation(4,8);
		</script>
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	<body>

	</body>
</html>
